Related Questions

Routers operate at layer _____. LAN switches operate at layer _____. Ethernet hubs operate at layer _____. Word processing operates at layer _____.
A 3, 3, 1, 7
B 3, 2, 1, none
C 3, 2, 1, 7
D 3, 3, 2, none
E All of the above
Which is the lowest layer of Atmosphere?
A Troposphere
B Stratosphere
C Mesosphere
D Exosphere
The lowest layer of atmosphere is known as the
A Stratosphere
B Troposphere
C Ionosphere
D None of these
The lowest layer of earth's atmosphere is
A Troposphere
B Stratosphere
C Mesosphere
D Ionosphere
Which layer of of atmosphere contains the ozone layer?
A Mesosphere
B Stratosphere
C Troposphere
D Thermosphere
The average marks of a student in 10 parers are 80. If the highest and the lowest scores are not considered, the average is 81 . If his highest score is 92. find the lowest.
A 55
B 60
C 62
D None of these
Which of the following is the uppermost layer of the atmosphere?
A Stratosphere
B Mesosphere
C Ionosphere
D Exosphere
Which of the following chemicals is responsible for depletion of ozone layer in the atmosphere?
A Chlorofluorocarbons
B Nitrous oxide
C Sulphur dioxide
D Carbon dioxide
Which of the following chemical materials is responsible for the depletion of ozone layer in the atmosphere ?
A Nitrous oxide
B Carbon dioxide
C Chlorofluorocarbon
D Sulphur dioxide
Very small amount of air pollutants are present in stratosphere also; though most of the atmospheric pollutants are present in the troposphere. Which of the following atmospheric pollutants does not cause the ozone layer depletion in atmosphere at tremendous rate?
A CO
B SO2
C NOx
D CFC (chloro fluoro carbons)

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